8.00658

Tetraethyl orthosilicate

for synthesis

• Synonym(s): Tetraethyl orthosilicate, Tetraethoxysilane
• Linear Formula: (C₂H₅O)₄Si
• CAS Number: 78-10-4
• Molecular Weight: 208.33
• MDL number: MFCD00009062
• EC Index Number: 201-083-8

Properties

• vapor pressure: 2 hPa ( 20 °C)
• Quality Level: 200
• assay: ≥99% (GC)
• form: liquid
• autoignition temp.: 230 °C
• potency: 6270 mg/kg LD₅₀, oral (Rat); 5860 mg/kg LD₅₀, skin (Rabbit)
• expl. lim.: 1.3-23 % (v/v)
• pH: 7 (20 °C)
• bp: 168.0 °C/1013 hPa
• mp: -85.5 °C
• transition temp: flash point 45 °C
• density: 0.94 g/cm³ at 20 °C
• storage temp.: 2-30°C
• InChI: 1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3
• InChI key: BOTDANWDWHJENH-UHFFFAOYSA-N

Description

General description

Tetraethylorthosilicate (TEOS) is the ethyl ester of ortho silicic acid, which is the most readily available silicon source. It is mainly used as a crosslinking agent in silicon polymer and precursor in the preparation of silicon thin films.

Packaging

1 l in Glass bottle

250 ml in Glass bottle

1 l

25 ml

2 g

10 , 50 kg in Barrel PE/met

Features and Benefits

TEOScan polymerize in alkaline, acidic, and neutral conditions, making it anadvantageous precursor

Analysis Note

Assay (GC, area%): ≥ 99.0 % (a/a)
Density (d 20 °C/ 4 °C): 0.932 - 0.934
Identity (IR): passes test

Safety Information

• Pictograms: GHS02,GHS07
• Signal Word: Warning
• Hazard Statements: H226 - H319 - H332 - H335
• Precautionary Statements: P210 - P233 - P240 - P241 - P304 + P340 + P312 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 1
• Flash Point(F): 113.0 °F - closed cup
• Flash Point(C): 45 °C - closed cup